Wave-set envelope



Feb. 6, 1945. E. CLINDEEN 2,369,060

WAVE-SET ENVELOPE 1 Filed March 1, 1945 4 Z mmvroge; H

Edwa YIC L/hdeen.

A TTORNEYS.

Patented Feb. 6, 1945 UNITED STATES PATENT OFFICE Edward:- C... Lindeen, New YorlaN. Y., assignor to.

Baltimore Baper Company, Kansas City,- Mo., a.

corporation of. Missouri 'ApplicatiomMarchl, 1943, SerialNoi 477506 3' Claim.

This. invention relates. to'envelopes and particul arly' to: envelopes for containing powder-like material capableof'chemical'reaction in the presence of amoistening liquidtogenerate heat, for example the heat" necessary in setting waves in a. head of hair; manufactured have not been. completely satisfac torysinc theymust'be constructed of amaterial capable of retaining thev heat; and moisture in contact with the wave beingrformed andat the sametime admit the moistening liquid.

In attempting-toprovide an. envelope having these characteristics metal foil or metalizedipaper have been used and have proved satisfactory'in retaining the heat and moisture, but-suchmaterials will not admit-the'moistening liquid.- This was solved by providing theinner face sideof the envelopewith perforationsthrough which the moistening liquid might enter the envelope-but the perforations allow sifting of the powder from the envelope during'filling and'handli'ng'with the substantial loss of powder before use. Also, the

v perforationsv did not permit instant distribution to all portions of'the powder contained within the envelope.

Other attempts have been made to construct the envelopes of a porous material through which the moisture could permeate and to treatselected surfaces thereof with metallic particles sufiicient to retain the heat and moisture, While. thisntype prevented sifting of the powder and allowed for passage of the moistening liquid, the. envelopes are less attractive, have less merchandising appeal', could not be as attractively embossed and printed, and if made of heavy enough material to retain embossing, arenot sufil'cientl'y pliant, so they could be curved readily around the, strand of hair wrapped within a wave set clamp.

It is, therefore, the principal objects of. the present invention to. provide. an envelope of. the character described whichv positively retains ,and

prevents sifting ofithejpowder which adniitslthe moistening liquid uniformly and substantially simultaneously throughout the contained: powd'enwhich. is of attractive, appearance, which. can be embossed in any. desired manner, and which may be efiicientlv manufactured on standard machinery,

Such envelopes asheretofore Itv is a further. object off the. invention to .pro- ;v

vide an envelope. structurewhich has. substantial strength but'is sufiiciently pliantto facilitatezapiplication inawavesetting clamp.

theenvelope.

Fig: 3 is aperspectiveview of the blank from g which the=envelope is formed, a part of-the nonabsorbent layer being detached from the absorbent layer to better illustrate the construction.

Fig. 4 is an enlarged section through the blank taken on the line 4-4 of Fig. 3. Fig. 5 is a" perspective view of the envelope after it i curved and" ready toapply in a wave set clamp,a part of the inner facethereoflceing broken away to illustrate the powder contained inthe envelope.

Fig; 6 is a cross-sectional'vi'ew through a filled envelope:

Fig. 7 is a perspective view of a blank for pro ducing' a modified" form of the invention.

Referring more in detail to the drawing: l -designates an envelope constructed in. ac-

cordance with the present invention and espei sheet materials 3 and 4' forming the exterior and interior surface of the envelope respectively.

The material? is substantially non-absorbent and; preferably, is, a relatively thin-metallic-like rfoil .or.. metal covered; paper which, is capable oi deflecting generated heat through, a, porous, face later, described. The material is capable. of. being embossedjasat. 5, and has a sheen-like. surfacev 6 i whichais. of, attractive appearance and, may be decorated. in, any suitable manner to give the desired,-merohandising appeal. The material I. is

formed of, relatively thin, pliant, porousmaterial capablev of passing. moisture; incidental; to; the

capillary characteristics of theefibres thereof and maintaining its strengthwhenrmoistened' as toiretaimpowder; material.

' metallic ply and thereby retained in contact The blank is shaped to provide a substantially rectangular front portion 1 defined by longitudinal and transverse lines of fold 89 and I --I I. The blank also includes a back portion l2 extending from the line of fold 9 and of a size substantially conforming to the front portion 1, a side flap l3 coextensive of the line of fold 8, a bottom flap l4 coextensive of'the line of fold I I, and a closure flap l5 coextensive of the line of fold In. Attention is directed to the fact that the line of fold In extends through both the front and backv portion of the envelope so as to form ears [6 and I! which fold with the closure flap as later de scribed. 1

The front portion 6 0f the exterior ply 3 of the envelope has an opening l8 therethrough of slightly smaller dimensions than the facethereof to expose a covering portion IQ of the inner ply 4,

openings i8-are died out, after which the'inner face of the strip is covered with an adhesive and admitting portion [9 of the envelope. obvious that the envelope may be suitably emreadily applied in that the entire envelope may be dipped into the moistening liquid. It is understood, however, that if the operators desire, the customary moisture carrying pad (not shown) may be wetted and applied over the .moisture It is also .bossed with trade-marks or various designs as desired.

What I claim and desire to secure by Letters .Patent is:

brought into sealing contact with a similar sheet forming the inner ply 4. The blanks may then be died from the laminated sheet to form the shape describedand shown in Fig. 3. The blanks may then be used in an ordinary envelope folding machine whereby the back portion I2 is folded on the line 8 over the front portion with the absorbent ply innermost after which adhesive is applied to the inner faces of the side and bottom flaps l 3 and I4 and they are folded over and sealed to the outer face of the back portion I2. When the blanks are thusformed, pockets 20 are provided having insert openings beneath the closure flap i5.

ltis. also possible to form envelopes embodying the present invention (see Fig. 7) on present window applying machinery known to the envelope industry. In this instance the outer ply fi isedied out with the opening 23 therein, after which patches 24 of absorptive material are applied to the inner face of the front portion of the envelopes by the adhesive as indicated at 25, Fig. 7. The blank is then folded and sealed as in the instance of the first form of the invention.

'1. A wave set envelope for containing a powdery wave setting chemical including alayer of In constructing the blank, theouter ply may be formed of sheet material from which the' substantially absorbent material impervious to said powdery chemical and having folds providing a plane front portion, a closure flap along one ed e of the front portion, and overlapping flaps on the remaining edges, said overlapping flaps being folded retractively in underlying relation with the rear face of said front portion and sealed together with an adhesive to form a back portion cooperating with the front portion to form a pocket adapted to contain a quantity of said powdery chemical, the portion of the pocket along said closure flap having an insert opening for insertion of said powdery chemical and adapted to be closed by said closure flap after the quantity of chemical is placed in said pocket,

and a relatively non-absorbent material adhering substantially absorbent material impervious to In using the envelopes constructed as described,

the pockets 2!) thereof may be filled with-powder designated 26 through the openings 2! by the aid of standard filling machinery, after which the closure flaps I 5 are gummed and closed on the line of fold 9 so that the ears I6 and I1 fold therewith to seal the openings 2| including'the ends thereof. When the envelopes are sealed they positively retain the powder and there are no openings or pores through which the powder may sift, consequently the exterior surfaces of the envelopes are at all times free of sifted powder.

When the packaged envelopes are used in setting hair Waves, the complete envelope may be clipped in a moistening liquid and curved longitudinally as shown in Fig. 5 to fit over a wound said powdery chemical and having folds providing a plane front portion, a closure flap along one edge of the front portion and overlapping flaps on the remaining edges, said overlapping flaps being folded retractively in underlying relation withsaidfront portion and sealed together with an adhesive to form a back portion cooperating with the front portion to form a pocket adapted to be completely closed by said folds for containing a quantity of said powdery chemical, the portion of the pocket along said closure fiap hav ing an insert opening for insertion of said pow dery chemical and adapted to be closed by said closure flap after the quantity of chemical is placed in said pocket, and a relatively non-ab sorbent material adhering to said overlapping flaps and extending in single thickness over marginal' edges of the plane front portion of said pocket for providing a window in] said front'po'r.-

tion through which a wetting liquid is adapted to penetrate in said pocket for energizing said chemical.

3. A-wave set envelope for containing a poi/v dery wave setting chemical including an inner layer of substantially absorbent material impervious to said powdery chemical and an outer layer of substantially non-absorbent material, said layers having folds providing a plane front portion, a closure flap and overlapping side and bottom flaps, said overlapping flaps being folded retractively in underlying relation with said plane front portion and sealed together with an adhesive to cooperate with the front portion for providing a closed pocket for containing a quantity of said powdery chemical, the portion of said pocket along said closure flap having an insert opening for said powdery chemical and adapted to be closed by said closure flap after the quantity i of said portions which expose the absorbent layer for permeation of a wetting liquid into said pocket to energize said chemical.

' EDWARD C. LINDEEN 

